SlackLinux vs Microsoft Teams ClassicWindows

Slack as a Linux alternative to Microsoft Teams Classic

Updated October 22, 2026

Our verdict

Slack is a solid replacement for Microsoft Teams Classic for teams focused on messaging, integrations, and workflow organization. It handles direct and group chats, file sharing, screen sharing, and video calls adequately, though the Linux client is officially in beta and may lack polish compared to Windows or macOS versions. It works well for organizations not deeply embedded in the Microsoft 365 ecosystem. Users needing deep Office integration or enterprise calling features may find gaps, but for general collaboration, Slack is functional and familiar.

Feature parity85%

License: LicenseRef-proprietary
Price: freemium
Latest version: 4.52.178 (October 8, 2026)
Rating: —

Install Slack Website ↗

Slack screenshot — The Slack main window, on GNOME in dark mode

What works the same

Both support persistent group and direct messaging with read receipts and reactions
Offer voice and video calls with screen sharing across platforms
Enable file sharing with previews and cloud storage integration
Support integrations with third-party tools and productivity apps
Sync messages and notifications across devices

What is different

Slack’s Linux client is in beta and may have stability or feature delays
No native integration with Microsoft Office apps like Word, Excel, or OneNote
Lacks PSTN calling and advanced telephony features found in Teams
Channels in Slack are user-created and flat, while Teams ties structure to Office groups
Slack relies more on threads; Teams keeps conversations linear by default

Opening your Microsoft Teams Classic files

Files shared in Slack (documents, spreadsheets, PDFs) can be downloaded and opened if you have compatible software, such as LibreOffice or OnlyOffice for Microsoft Office formats. Slack supports previews for common file types, similar to Teams. However, there's no direct way to export chat history or files from Teams to Slack. Migration tools exist but require admin setup and may not preserve metadata perfectly. Office files created in Teams with real-time co-authoring may lose edit history when moved.

Switching from Microsoft Teams Classic to Slack, step by step

Export important files and chat history from Microsoft Teams using admin tools or manual download
Create a new Slack workspace and invite team members via email
Set up channels to mirror key Teams groups or projects
Install and configure Slack apps for any critical integrations (e.g., Google Workspace)
Train team members on Slack workflows, especially thread usage and notifications

Key features of Slack

Channel-based organization for topics and projects
Direct messaging with read receipts and reactions
File sharing with preview support for common formats
Integration with third-party tools via Slack Apps
Threaded conversations to keep main channels uncluttered
Cross-device sync for messages and notifications
Customizable notification settings per channel or DM
Beta Linux client with ongoing feature additions

How to install Slack on Linux

Flatpak (Flathub)flatpak install flathub com.slack.Slack

Frequently asked questions

Can I use Slack on Linux without issues?

Yes, but the Linux client is in beta. It works well for core messaging and file sharing, but occasional bugs or missing features may occur. The web app is a reliable alternative.

Does Slack support video meetings like Teams?

Yes, Slack supports voice and video calls with screen sharing, but it relies on WebRTC and doesn’t include dial-in numbers or full PSTN support like Teams with Microsoft Calling Plans.

Can I integrate Slack with Microsoft Office files?

You can share and view Office files in Slack, and preview them inline. Real-time co-editing requires uploading to OneDrive or SharePoint manually, as Slack doesn’t host Office integrations natively.